Stop for talking-machines



W. J. MURDO'CK.

STOP FOR TALKING MACHINES. APPLICATION FILED MAY 29, 1920.

Patented Sept. 20,1921.

2 SHEETS-SHEET I.

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. STOP FOR TALKING MACHINES. 1,391,565. APPLICATION FILED v2.9, 1920. Patentedsept. 20 I 2 SHEETSSHEET 2- WJMurdOCk mvznrron I A'rroRNEY wn'NEsstS tion upon a ,ping theoperation of the .machine at theend of a record.

WILLIAM J. 'IIHJ'RIDOCK,

or CLINTON, INDIANA.

's'ror ron TALKING-MACHINES.

7 Application filed May 29,

To all whom it may concern:

Be it known that I, IVILLI'AM J. MURDOOK, citizen of the United States of America, residing at Clinton, in the county of Vermilion and State of Indiana, have-invented new and useful Improvements in Stops for Talking-Machines, of which the following is a specification.

This invention relates to improvements in phonographs' and has for an object the provisionofmeans for automatically stop- Another object ated to automatically move a brake member into engagement with theturntable at the end of the record, so that the operation of the motor will be automatically stopped. V

WVith the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the claims hereto appended.

In the drawings V Figure 1 is a plan viewillustrating the application of the invention with the parts in normal position. c I

Fig. 2 is an edge view of the same.

Fig. 3 is a view similar to Fig. 1, but showing the parts in a position opposite to that shown in the said Fig. 1

Fig. 4 is a like View illustrating the position of the parts with the brake as applied, a fragmentary portion of the turntable flange being shown. 7

Referring to the drawings in detail, wherein like characters of reference denote corresponding parts, thereference character 10 indicates the assembly plate of a spring motor of the type usually employed in phonographs, while 11 indicates the tone arm and 12 a form of governor commonly used in machines of this character.-

The invention comprises an arm 13, which carries at one end a split band 14, for attachment to the tone arm 11 and having its free ends secured together as indicated at 15. The opposite end of the arm 13 is bifurcated and carries set screws 16, which operates in slots 17, provided in the bifurcated end of a link 18. This link has one end pivotally connected'as shown at 19 to a disk 20, the latter being mounted for rotashort shaft 21' extending from Specification of Letters Patent.

' Patented Sept. 20,1921. 1920. Serial No. 385,229. r v I the plate 10. Thedisk 20 a designed to be H rotated by the movement of the tone arm 11 as the latter travels over the surface of a record during the operation of the machine,

the movement of the said disk being limited in one direction bymeans o'fa tooth 22, which engages the, stop 23 carried by the plate 10. I I

' The disk 20 is designed tojbe alternately moved in opposite directions during the play ing of the'record and for -thepurpose of moving the disk. in a direction opposite to v I r V I that due to the movement of the tone arm 11, V is the provision of. a phonograph attachment in which the motor operthe said disk is provided with an additional tooth .22 which is designedto be engaged by an'arm 24 carried bya star wheelor gear,

25. This gear is rotatably mounted upon a "short shaft 26, which is also carried by the plate 10 and movement of this gear is effected through themediumof a finger or stu d127, which projects radially from the shaft .28 which carries the turn-table upon I whichtherecord is supported, the turn-table being shown bycdotted lines as indicated at 29. Both the disk 20 and the gear 25 have connected thereto the ends of coil springs 30 and 31 respectively, while the opposite ends of. these springs are secured to the shafts 21 and 26, in which the disk and gear are mounted.

Pivotally mounted upon the disk 20 as indicated at 32, is a lever 33, one end of which ispositioned for engagement with the arm 24, whileits opposite end is designed to engage one end of a brake arm 35. This brake arm is pivotally mounted as shown at 36' upon a plate 37 and has connected thereto a spring 38. The end of the brake arm opposite that engaged by the lever 33 is positioned for engagement with a pivoted disk 39 having a notch 40 in its periphery. Mounted upon this disk is a friction member 41 which is urged into engagement with the flange of the turntable by means of a spring an operating handle 43. V

In the operation of the invention, after the machine has been started, the movement of the tone arm over the record will, through the medium of the arm 13 and the link 18, rotate the disk. in a direction toward the stop 23, until the latter is engagedby the tooth 22. In the meantime, the operation of'the turntable shaft 28 will operate the gear 25,

whose arm 24 will engage the tooth 2 2 and move the disk in an opposite direc- 10c 42. In addition, the disk 39 is provided with i tion to prevent engagement of the arm 24 and the adjacent end of the lever 33. When the tone arm 11 stops at the end of the record, movement of the arm 13will be arrested and will therefore impart no rotary movement to the disk 20, whereupon the lever 33 will remain in position for engagement by the arm 24: and the latter will be moved upon its pivot to engage one end of the brake arm 35, so as to cause the opposite end of the last mentioned arm to be disengaged from the notch and permit the friction member 41 to be moved into engagement with the turntable flange.

When it is again desired to start the operation of the phonograph, the disk 39 is rotated by means of the handle 43 until the end of the arm 35 engages the notch 40,

'whereupon the friction member will be disengaged and the turntable permitted to rotate.

The invention is susceptible of various changes in its form, proportions and minor f details of construction and theright is herein reserved to make such changes as properly fall within the scope of the'ap'pended claims. Having described the invention what is claimed is: r p v I 1. The combination with a phonograph, of a brake, a rotatable element, a pivotally mounted spring pressed brake actuating lever carried by the rotatable element and adapted for engagement with the brake, means operated by-themovement of the tone arm over the record for moving the brake actuating lever away from the brake and means operated by the motor when the tone arm movement ceases to engagethe brake actuating lever and apply the brake.

2. The combination with a phonograph, of a brake, arotatable element, a brake actuating lever carried thereby,'means operated by the movement of the tone arm over the record for moving the actuating lever away from the brake and an arm carried bythe turn table shaft and engageable with the brake actuating lever to applythe brake when the tone arm movement ceases.

3. The combination with a phonograph, of a brake, a rotatable element, a brake'actuating lever carried by the rotatable element, v

means whereby the operation of the turntable shaft will move the rotatable element 7 in one direction and bring the brake actuating member into positlon for operating the brake, means operated by the movement of the tone arm over the record for moving the rotatable element in an opposite direction and means whereby the operation of the turn table shaft will engage the brake actuating lever and apply the brake when the move--- ment of the tone arm ceases. r

WILLIAM J. MURDOCK. 

